WDSU investigative reporter Travers Mackel said Ursin, who has been considered the longtime No. 2 man at the Sheriff's Office, might have been part of a scheme in which local businesses and festivals were overbilled for off-duty deputy work details.

The FBI or the state legislative auditor did not confirm the investigations into Ursin, but Monday's announcement follows a scathing report by the state auditor on the Sheriff's Office. Ursin was not mentioned by name in the report, which focused more on the practices of the Sheriff's Office as a whole.

The more than 40-page report details questionable pay practices, the office's off-duty detail program and issues with a jail renovation project.

Legislative Auditor Daryl G. Purpera wrote that the audit was conducted after his office received allegations surrounding the Sheriff's Office. The audit involved reviewing financial records and other documents.

One of the issues the audit found was that ineligible employees in the Sheriff's Office received $1,026,083 in state supplemental pay from January 2011 to September 2014.

The Sheriff's Office responded Monday to the report. Officials said the Sheriff's Office disagreed that any of the employees who received supplemental pay were ineligible but declined to discuss the report's findings regarding a separate deputy's business doings or the off-duty detail program.

Stay with WDSU-TV and WDSU.com as information is released about Ursin's resignation.

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